Calculate the standard molar enthalpy, Physics

(a) Using the thermochemical tables provided, calculate the standard molar enthalpy of combustion at 298 K for the following hydrocarbon:  C C2H4 (g ) (ethene) 

(b)  If a combustion reaction were carried out in a bomb calorimeter using 55g of your compound, what would be the amount of heat released?       

(c)  Estimate the standard molar enthalpy of combustion of the compound used in part (a), at  a temperature of 376.9K, given the following molar heat capacities:                            

 

Cp,m/ J K-1 mol-1

 

A C3H8 (g)

73.5

B C4H10 (g )

97.5

C C2H4 (g )

43.6

D C3H6 (g )

63.9

EC4H8 (g )

85.7

O2 (g)

29.4

CO2 (g)

37.1

H2O (l)

75.3

What assumption has been made in your calculation?

(d)   From the mean bond enthalpy data given below, estimate the enthalpy change for the complete combustion of  one mole of  your compound at 298 K.  (The molar enthalpy of vaporization of water is 45.0 kJ mol-1 at 298K).

Bond

C-H

O=O

O-H

C=O

C-C

C=C

 Mean bond enthalpy/kJmol-1

414

499

460

799

347

612

 (e) Comment on your answers to parts (a) and (d). 

Posted Date: 3/22/2013 5:52:02 AM | Location : United States







Related Discussions:- Calculate the standard molar enthalpy, Assignment Help, Ask Question on Calculate the standard molar enthalpy, Get Answer, Expert's Help, Calculate the standard molar enthalpy Discussions

Write discussion on Calculate the standard molar enthalpy
Your posts are moderated
Related Questions
In the figure below the closed curves A and B represent closed surfaces. What is the total flux by the closed surface A? Ans: In concurrence with Gauss's Law the net o

A) Explain the flow of direct current? ( describe direct current) b) Explain  the effect of resistance in circuits? (Describe  effect of resistance)

Presume you are asked to find the characteristics of the image of an actual physical object formed by a single lens and you obtain a negative value for the magnification. What does

what is quatum number

How many integers satisfy the inequality |10(x+1)/x^2+2x+3|=1?

The Broken Pencil-Ray Optics A general classroom demonstration includes placing a pencil (or similar object) within an upright position within a round glass of water. The penci

What is the name of the first American physicist to win two Nobel prizes? Ans: (John) bardeen was the first American physicist who win two Nobel prizes.

Briefly explain with necessary theory how you will calculate refractive index of water/transparent liquid by using Newton's ring apparatus?

Coupling  Capacitor  (Cc) It's  an  electrolytic  capacitor  used  to  couple  one  stage  of amplification to the next stage or load. It allows only amplified ac signal to pas